The plane defined by the upper border of the bony auditory meatus (porion) bilaterally and the lowest point of the left orbit rim (orbitale) was accepted by the World Congress on Anthropology (Frankfurt) in 1884 as the horizontal reference for human craniometrics. As the science of Gnathology was developed in the 1920s (Charles Stuart, B. B. McCullum, and others) and sophisticated articulator technology to support it, the Frankfort was accepted (by convention) as the reference plane for orientation of the maxillary cast to the upper member of the articulator. All fully- or semi-adjustable articulator systems incorporate a device (usually, facebow or earbow) to record the relationship of the maxillary dental arch to these three points to transfer that relationship to the maxillary cast and articulator.
A horizontal angle is an angle between lines on a horizontal plane.
it is the Transverse plane. the transverse, or horizontal plane is a crosswise plane that runs parallel to the ground. this imaginary cut would divide the body or its parts into upper and lower portions.
because they are parallel to the plane of the horizon
Horizontal plane Frontal plane
Any flat surface that is not coplanar with the horizontal plane.
World anatomists got together in Frankfort, Germany, around 1875 to agree on nomenclature. In defining "anatomical position" they decided that a horizontal plane formed by left and right poria and left orbitale would define anatomical position for the head, hence "Frankfort Horizontal."
Since a hexagon is a horizontal plane figure it cannot have a horizontal plane of symmetry.
A horizontal angle is an angle between lines on a horizontal plane.
it is the Transverse plane. the transverse, or horizontal plane is a crosswise plane that runs parallel to the ground. this imaginary cut would divide the body or its parts into upper and lower portions.
transverse
because they are parallel to the plane of the horizon
The horizontal line in the Cartesian plane is called the x-axis or x-coordinate.
The Cartesian plane has only 1 horizontal axis and it is known as the x-axis.
The horizontal cut is called the transverse plane.
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Tranverse plane
the plane which is perpendicular to both horizontal plane and vertical plane is called as "PROFILE PLANE"